Boot Problem on 4000T Cyberstorm PPC Scsi Bus

[Vanilla]

I know it's old but I just found it by Googling for "CyberStorm SCSI" as a friend has this exact problem. Then I encountered the symptoms myself but with a WarpEngine SCSI.Including the BB patch causing my machine display a blank screen and lose the drives when booting. I knewe it wanted to boot but just stood there with the floppy drive clicking.

Now I eventually also got hold of a CyberStorm SCSI myself. And when I set it up I read the mamual through and made sure both my hardware and software were set up correctly. That said, you guys missing something! I did not see one mention of what is highly important device driver settings: MaxTransfer and Mask!

These, though they are technical, MUST be set up correctly as per the instructions!! Otherwise you can expect missing drives, crashes and gerneal unstability! :-o

I don't know why they designed it this way and not so the device driver did all these techncal settiings itself but all controllers differ and they must be set correctly.

Ergo, you cannot pull a HD from your A4091 and stick it on your CyberSCSI, without adjusting the settings and at least setting MaxTransfer to the smallest safest value supported by both controllers.

[Vanilla]

The CSPPC SCSI is a different affair but on a CyberStorm 060 68K SCSI and WarpEngine I had problems! As one example my CD0 device kept crashing. I checked and I had an overflown MaxTransfer. IIRC it was set to 0x7FFFFFFF but CS SCSI has max of 0xFFFFFF! I cut it back and I could read CDs without crashing.

AFAIK it must reside in the area of 24-bit DMA.

So in my experience it is not an old wife tale but a fact!

[Vanilla]

Yes I know it was about HDDs but the settiings still matter for the controller. That was just an example. On my A4000D I have a CyberStom MkII with SCSI with correct settings.

On previous setups where Max and Mask were not set correctly I experenced immediate crash at power on due to installing FFS into the RDB. I also experienced drives going missing in the bootup process after applying the OS3.9 Boing patches where all I could see was a black screen and hear my floppy drive clicking.

So you can understand why I place importance on it. It may not affect all drive problems but I found it's better to set it up correctly and cross it off the list than ignoring it and hoping all the problems will go away.